DE59702217D1 - DEVICE FOR CALIBRATING DISTANCE MEASURING DEVICES - Google Patents

DEVICE FOR CALIBRATING DISTANCE MEASURING DEVICES

Info

Publication number
DE59702217D1
DE59702217D1 DE59702217T DE59702217T DE59702217D1 DE 59702217 D1 DE59702217 D1 DE 59702217D1 DE 59702217 T DE59702217 T DE 59702217T DE 59702217 T DE59702217 T DE 59702217T DE 59702217 D1 DE59702217 D1 DE 59702217D1
Authority
DE
Germany
Prior art keywords
radiation
transmitter
receiver
frequency
calibration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE59702217T
Other languages
German (de)
Inventor
Kurt Giger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leica Geosystems AG
Original Assignee
Leica Geosystems AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7809267&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE59702217(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Leica Geosystems AG filed Critical Leica Geosystems AG
Application granted granted Critical
Publication of DE59702217D1 publication Critical patent/DE59702217D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/497—Means for monitoring or calibrating

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Optical Distance (AREA)

Abstract

A transmitter emits high-frequency modulated optical radiation which is reflected by an object and is received by a measurement receiver. Part of the transmitter radiation is decoupled as reference radiation and guided via a calibration path to a reference receiver whose electrical signals are fed to a frequency mixer. The frequency mixer and avalanche photodiodes acting as measurement receivers of the measuring radiation are interconnected directly via an electrical connection line upon which a mixer frequency acts. As a result thereof, optoelectronic calibration which completely compensates for the temperature-dependent phase shifts of the avalanche photodiodes is possible. Additionally, the phase shifts generated in the reference and receiver signals by the temperature drifts of the transmitter compensate one another. The overall accuracy of the distance measurement can be increased, particularly for short measuring times and immediately after the apparatus has been switched on. Furthermore, in comparison with a successive mechanical calibration process, the measuring times are halved and advantages in terms of weight, cost, and reliability are afforded since a mechanical change-over device is dispensed with.
DE59702217T 1996-10-21 1997-10-17 DEVICE FOR CALIBRATING DISTANCE MEASURING DEVICES Expired - Lifetime DE59702217D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19643287A DE19643287A1 (en) 1996-10-21 1996-10-21 Method and device for calibrating distance measuring devices
PCT/EP1997/005735 WO1998018019A1 (en) 1996-10-21 1997-10-17 Device for calibrating distance-measuring apparatus

Publications (1)

Publication Number Publication Date
DE59702217D1 true DE59702217D1 (en) 2000-09-21

Family

ID=7809267

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19643287A Withdrawn DE19643287A1 (en) 1996-10-21 1996-10-21 Method and device for calibrating distance measuring devices
DE59702217T Expired - Lifetime DE59702217D1 (en) 1996-10-21 1997-10-17 DEVICE FOR CALIBRATING DISTANCE MEASURING DEVICES

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19643287A Withdrawn DE19643287A1 (en) 1996-10-21 1996-10-21 Method and device for calibrating distance measuring devices

Country Status (9)

Country Link
US (1) US6463393B1 (en)
EP (1) EP0932835B2 (en)
JP (1) JP3161738B2 (en)
KR (1) KR100484345B1 (en)
CN (1) CN1134673C (en)
AT (1) ATE195588T1 (en)
AU (1) AU719134B2 (en)
DE (2) DE19643287A1 (en)
WO (1) WO1998018019A1 (en)

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Also Published As

Publication number Publication date
JP2000505901A (en) 2000-05-16
CN1241261A (en) 2000-01-12
CN1134673C (en) 2004-01-14
WO1998018019A1 (en) 1998-04-30
AU719134B2 (en) 2000-05-04
ATE195588T1 (en) 2000-09-15
KR20000052660A (en) 2000-08-25
AU4867897A (en) 1998-05-15
JP3161738B2 (en) 2001-04-25
DE19643287A1 (en) 1998-04-23
EP0932835B1 (en) 2000-08-16
EP0932835B2 (en) 2005-03-09
EP0932835A1 (en) 1999-08-04
US6463393B1 (en) 2002-10-08
KR100484345B1 (en) 2005-04-20

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8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings